Home / 135,349.72-186,780.03-74,920.42

Finding the Fourth Proportional to 135,349.72, 186,780.03 and 74,920.42

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Solution

The fourth proportional to 135,349.72, 186,780.03 and 74,920.42 is: 103,388.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,349.72 : 186,780.03 = 74,920.42 : x
  2. Step 2: Convert to fraction form
    135,349.72/186,780.03 = 74,920.42/x
  3. Step 3: Cross multiply
    135,349.72x = 186,780.03 × 74,920.42
  4. Step 4: Simplify right side
    135,349.72x = 13,993,638,295.21
  5. Step 5: Solve for x
    x = 13,993,638,295.21/135,349.72
  6. Step 6: Final answer
    x = 103,388.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.